<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
</head>
<body>
    <div id="root">
        <div>{{msg}}</div>
    </div>
    <script>
        const app=new Vue({
            el:'#root',
            data(){
                return {
                    msg:'Hello World'
                }
            }
        })
    </script>
</body>
</html>